[Demonstration by immunofluorescence of somatostatin cells in the islets of Langerhans in 3 species of monkeys].

Indirect immunofluorescence technique with anti-somatostatin serum has allowed us to detect somatostatin containing cells in the Langerhans' islets of three species of monkeys (Macacus irus, Papio hamadryas, Cercopithecus aethiops). These cells are in close relationship with another cells, but occupy a more central position in the islets. Thus, the distribution of somatostatin-containing cells in the monkey's endocrine pancreas has not a similar pattern as in rodent's pancreas; they have a comparable topography as in the human islets but these cells are always more elongated than in the human islets. Only slight morphological differences are observed in the three species of monkeys.